I tried to book a hotel with booking.com, but when I tried to confirm my booking, the website told me that the place I was trying to book had just been booked and I should look for something else. So, I booked something else... Then shortly after, I checked my email and saw that the original booking had actually in fact gone through and I now had two bookings for the same dates, both non-refundable, and could not be cancelled. I called booking.com several times to explain the problem. Every time, they said they would try to cancel one of the bookings and would call me back. Each time, then never called me back, and each time I made follow-up calls, then told me there was nothing they would do, and since both bookings were non-refundable, I would have to pay for them. Despite the problem I was having being caused by an error with booking.com website, they never helped me and I ended up paying for both places. Absolutely unacceptable behaviour of a business towards a customer- DO NOT USE BOOKING.COM!